Erbju[m]

Erbju[m] (Er)

chemical element with atomic number 68
Atomic Number68
Atomic Weight167.259
mass number166
Group
Period6
Blockf
proton68 p+
neutron98 n0
elettron68 e-
Animated Bohr model of Er (Erbju[m])

Physical Property

Atomic Radius
175 pm
molar volume
covalent radius
165 pm
Metallic Radius
ionic radius
89 pm
Crystal Radius
103 pm
Van der Waals radius
229 pm
densità
9.07 g/cm³
Atomic Radii Of The Elements: Erbju[m]0102030405060708090100110120130140150160170180190200210220230pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

enerġija
proton affinity
electron affinity
ionization energy
ionization energy of Er (Erbju[m])
enthalpy of vaporization
317 kJ/mol
enthalpy of fusion
standard enthalpy of formation
316.4 kJ/mol
elettron
electron shell2, 8, 18, 30, 8, 2
Bohr model: Er (Erbju[m])
valence electron2
Lewis structure: Er (Erbju[m])
electron configuration[Xe] 4f12 6s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 4f12 6s2
Enhanced Bohr model of Er (Erbju[m])
Orbital Diagram of Er (Erbju[m])
oxidation number0, 2, 3
electronegativity
1.24
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
3,141.15 K
Melting Point
1,802.15 K
critical pressure
critical temperature
triple point
appearance
kulur
Silver
appearancesilvery white
refractive index
thermodynamic material property
Thermal Conductivity
thermal expansion
0.0000122 1/K
molar heat capacity
28.12 J/(mol K)
Specific Heat Capacity
0.168 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
electrical conductivity
1.2 MS/m
electrical resistivity
0.00000086 m Ω
superconductivity
magnetism
typeparamagnetic
magnetic susceptibility (Mass)
0.00000377 m³/Kg
magnetic susceptibility (Molar)
0.000000630566 m³/mol
magnetic susceptibility (Volume)
0.0341788
magnetic ordering
Curie temperature
32 K
Néel temperature
82 K
structure
Crystal StructureSimple Hexagonal (HEX)
lattice constant
3.56 Å
Lattice Anglesπ/2, π/2, 2 π/3
mechanical property
hardness
bulk modulus
44 GPa
shear modulus
28 GPa
Young's modulus
70 GPa
Poisson's ratio
0.24
speed of sound
2,830 m/s
classification
CategoryLanthanides, Lanthanides
CAS Group
IUPAC Group
Glawe Number22
Mendeleev Number35
Pettifor Number23
Geochemical Classrare earth & related
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
150 ± 10 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
165
Neutron Mass Absorption
0.036
quantum number3H6
space group194 (P63/mmc)

Isotopes of Erbium

Stable Isotopes3
Unstable Isotopes36
Natural Isotopes6
Isotopic Composition16633.50%16633.50%16826.98%16826.98%16722.87%16722.87%17014.91%17014.91%1641.60%1641.60%1620.14%1620.14%

142Er

mass number142
neutron number74
relative atomic mass
141.970016 ± 0.000537 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention
parity+

decay modeintensity
p (proton emission)

143Er

mass number143
neutron number75
relative atomic mass
142.966548 ± 0.000429 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin9/2
nuclear quadrupole moment
time of discovery or invention2005
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
β+ p (β+-delayed proton emission)

144Er

mass number144
neutron number76
relative atomic mass
143.9607 ± 0.00021 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention2003
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)

145Er

mass number145
neutron number77
relative atomic mass
144.957874 ± 0.000215 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
900 ± 200 ms
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1989
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)

146Er

mass number146
neutron number78
relative atomic mass
145.952418357 ± 0.000007197 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
1.7 ± 0.6 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1993
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)

147Er

mass number147
neutron number79
relative atomic mass
146.949964456 ± 0.000041 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
3.2 ± 1.2 s
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1992
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)

148Er

mass number148
neutron number80
relative atomic mass
147.944735026 ± 0.000011 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
4.6 ± 0.2 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1982
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)0.15%

149Er

mass number149
neutron number81
relative atomic mass
148.942306 ± 0.00003 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
4 ± 2 s
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1984
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)7%

150Er

mass number150
neutron number82
relative atomic mass
149.937915524 ± 0.000018458 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
18.5 ± 0.7 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1982
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

151Er

mass number151
neutron number83
relative atomic mass
150.937448567 ± 0.000017681 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
23.5 ± 2 s
spin7/2
nuclear quadrupole moment
time of discovery or invention1970
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

152Er

mass number152
neutron number84
relative atomic mass
151.935050347 ± 0.000009478 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
10.3 ± 0.1 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1963
parity+

decay modeintensity
α (α emission)90%
β+ (β+ decay; β+ = ϵ + e+)10%

153Er

mass number153
neutron number85
relative atomic mass
152.93508635 ± 0.000009967 Da
g-factor
-0.26628571428571 ± 0.002
natural abundance
radioactivity☢️ radioactive element
half-life
37.1 ± 0.2 s
spin7/2
nuclear quadrupole moment
-0.42 ± 0.02
time of discovery or invention1963
parity-

decay modeintensity
α (α emission)53%
β+ (β+ decay; β+ = ϵ + e+)47%

154Er

mass number154
neutron number86
relative atomic mass
153.932790799 ± 0.000005325 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
3.73 ± 0.09 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1963
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)0.47%

155Er

mass number155
neutron number87
relative atomic mass
154.93321571 ± 0.00000652 Da
g-factor
-0.19028571428571 ± 0.0014285714285714
natural abundance
radioactivity☢️ radioactive element
half-life
5.3 ± 0.3 m
spin7/2
nuclear quadrupole moment
-0.27 ± 0.02
time of discovery or invention1969
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)99.978%
α (α emission)0.022%

156Er

mass number156
neutron number88
relative atomic mass
155.931065926 ± 0.00002644 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
19.5 ± 1 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1967
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)1.2%

157Er

mass number157
neutron number89
relative atomic mass
156.931922652 ± 0.000028454 Da
g-factor
-0.274 ± 0.002
natural abundance
radioactivity☢️ radioactive element
half-life
18.65 ± 0.1 m
spin3/2
nuclear quadrupole moment
0.92 ± 0.01
time of discovery or invention1966
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

158Er

mass number158
neutron number90
relative atomic mass
157.929893474 ± 0.000027074 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
2.29 ± 0.06 h
spin0
nuclear quadrupole moment
0
time of discovery or invention1961
parity+

decay modeintensity
ϵ (electron capture)100%

159Er

mass number159
neutron number91
relative atomic mass
158.93069079 ± 0.00000391 Da
g-factor
-0.202 ± 0.0013333333333333
natural abundance
radioactivity☢️ radioactive element
half-life
36 ± 1 m
spin3/2
nuclear quadrupole moment
1.17 ± 0.01
time of discovery or invention1962
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

160Er

mass number160
neutron number92
relative atomic mass
159.929077193 ± 0.000026029 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
28.58 ± 0.09 h
spin0
nuclear quadrupole moment
0
time of discovery or invention1954
parity+

decay modeintensity
ϵ (electron capture)100%

161Er

mass number161
neutron number93
relative atomic mass
160.93000353 ± 0.000009419 Da
g-factor
-0.24266666666667 ± 0.002
natural abundance
radioactivity☢️ radioactive element
half-life
3.21 ± 0.03 h
spin3/2
nuclear quadrupole moment
1.363 ± 0.008
time of discovery or invention1954
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

162Er

mass number162
neutron number94
relative atomic mass
161.928787299 ± 0.000000811 Da
g-factor
0
natural abundance
0.139 ± 0.005
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention1938
parity+

decay modeintensity
α (α emission)
+ (double β+ decay)

163Er

mass number163
neutron number95
relative atomic mass
162.930039908 ± 0.000004967 Da
g-factor
0.2224 ± 0.0016
natural abundance
radioactivity☢️ radioactive element
half-life
75 ± 0.4 m
spin5/2
nuclear quadrupole moment
2.56 ± 0.02
time of discovery or invention1953
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

164Er

mass number164
neutron number96
relative atomic mass
163.929207739 ± 0.000000755 Da
g-factor
0
natural abundance
1.601 ± 0.003
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention1938
parity+

decay modeintensity
α (α emission)
+ (double β+ decay)

165Er

mass number165
neutron number97
relative atomic mass
164.930733482 ± 0.000000985 Da
g-factor
0.2564 ± 0.0016
natural abundance
radioactivity☢️ radioactive element
half-life
10.36 ± 0.04 h
spin5/2
nuclear quadrupole moment
2.71 ± 0.03
time of discovery or invention1950
parity-

decay modeintensity
ϵ (electron capture)100%

166Er

mass number166
neutron number98
relative atomic mass
165.930301067 ± 0.000000358 Da
g-factor
0
natural abundance
33.503 ± 0.036
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1934
parity+

167Er

mass number167
neutron number99
relative atomic mass
166.932056192 ± 0.000000306 Da
g-factor
-0.16065714285714 ± 0.00011428571428571
natural abundance
22.869 ± 0.009
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin7/2
nuclear quadrupole moment
3.57 ± 0.03
time of discovery or invention1934
parity+

168Er

mass number168
neutron number100
relative atomic mass
167.932378282 ± 0.00000028 Da
g-factor
0
natural abundance
26.978 ± 0.018
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1934
parity+

169Er

mass number169
neutron number101
relative atomic mass
168.934598444 ± 0.000000326 Da
g-factor
0.9656 ± 0.0008
natural abundance
radioactivity☢️ radioactive element
half-life
9.392 ± 0.018 d
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1956
parity-

decay modeintensity
β (β decay)100%

170Er

mass number170
neutron number102
relative atomic mass
169.935471933 ± 0.000001488 Da
g-factor
0
natural abundance
14.91 ± 0.036
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention1934
parity+

decay modeintensity
(double β decay)
α (α emission)

171Er

mass number171
neutron number103
relative atomic mass
170.938037372 ± 0.000001511 Da
g-factor
0.2628 ± 0.004
natural abundance
radioactivity☢️ radioactive element
half-life
7.516 ± 0.002 h
spin5/2
nuclear quadrupole moment
2.86 ± 0.09
time of discovery or invention1938
parity-

decay modeintensity
β (β decay)100%

172Er

mass number172
neutron number104
relative atomic mass
171.939363461 ± 0.000004253 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
49.3 ± 0.5 h
spin0
nuclear quadrupole moment
0
time of discovery or invention1956
parity+

decay modeintensity
β (β decay)100%

173Er

mass number173
neutron number105
relative atomic mass
172.9424 ± 0.00021 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1.434 ± 0.017 m
spin7/2
nuclear quadrupole moment
time of discovery or invention1972
parity-

decay modeintensity
β (β decay)100%

174Er

mass number174
neutron number106
relative atomic mass
173.94423 ± 0.00032 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
3.2 ± 0.2 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1989
parity+

decay modeintensity
β (β decay)100%

175Er

mass number175
neutron number107
relative atomic mass
174.94777 ± 0.00043 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1.2 ± 0.3 m
spin9/2
nuclear quadrupole moment
time of discovery or invention1996
parity+

decay modeintensity
β (β decay)100%

176Er

mass number176
neutron number108
relative atomic mass
175.94994 ± 0.00043 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention2012
parity+

decay modeintensity
β (β decay)

177Er

mass number177
neutron number109
relative atomic mass
176.95399 ± 0.00054 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin1/2
nuclear quadrupole moment
0
time of discovery or invention2012
parity-

decay modeintensity
β (β decay)

178Er

mass number178
neutron number110
relative atomic mass
177.956779 ± 0.00064 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention2012
parity+

decay modeintensity
β (β decay)

179Er

mass number179
neutron number111
relative atomic mass
178.961267 ± 0.000537 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin3/2
nuclear quadrupole moment
time of discovery or invention2018
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)

180Er

mass number180
neutron number112
relative atomic mass
179.96438 ± 0.000537 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention2018
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
Erbium

storja

discoverer or inventorCarl Mosander
location of discoverySweden
time of discovery or invention1843
etimoloġijaNamed after the Swedish town, Ytterby.
pronunciationUR-bi-em (Ingliż)

source

Abundance
Abundance in Earth's crust
3.5 mg/kg
natural abundance (ocean)
0.00000087 mg/L
natural abundance (human body)
natural abundance (meteoroid)
0.000018 %
natural abundance (Xemx)
0.0000001 %
Abundance in Universe
0.0000002 %

Nuclear Screening Constants

1s1.3263
2p4.346
2s17.7984
3d13.6397
3p20.3891
3s20.9231
4d35.7288
4f40.0216
4p32.8908
4s31.768
5p50.528
5s48.282
6s59.5238